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    GitHub
    <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav>  <ul class="sidebar-links"><li><a href="/vdoing-demo-repository/pages/c438df/" class="sidebar-link">01_认识 Python</a></li><li><a href="/vdoing-demo-repository/pages/54ff73/" aria-current="page" class="active sidebar-link">02_第一个 Python 程序</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header level2"><a href="/vdoing-demo-repository/pages/54ff73/#目标" class="sidebar-link">目标</a></li><li class="sidebar-sub-header level2"><a href="/vdoing-demo-repository/pages/54ff73/#_01-第一个-hellopython-程序" class="sidebar-link">01. 第一个 HelloPython 程序</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header level3"><a href="/vdoing-demo-repository/pages/54ff73/#_1-1-python-源程序的基本概念" class="sidebar-link">1.1 Python 源程序的基本概念</a></li><li class="sidebar-sub-header level3"><a href="/vdoing-demo-repository/pages/54ff73/#_1-2-演练步骤" class="sidebar-link">1.2 演练步骤</a></li><li class="sidebar-sub-header level3"><a href="/vdoing-demo-repository/pages/54ff73/#_1-3-演练扩展-认识错误-bug" class="sidebar-link">1.3 演练扩展 —— 认识错误（BUG）</a></li></ul></li><li class="sidebar-sub-header level2"><a href="/vdoing-demo-repository/pages/54ff73/#_02-python-2-x-与-3​​-x-版本简介" class="sidebar-link">02. Python 2.x 与 3​​.x 版本简介</a></li><li class="sidebar-sub-header level2"><a href="/vdoing-demo-repository/pages/54ff73/#_03-执行-python-程序的三种方式" class="sidebar-link">03. 执行 Python 程序的三种方式</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header level3"><a href="/vdoing-demo-repository/pages/54ff73/#_3-1-解释器-python-python3" class="sidebar-link">3.1. 解释器 python / python3</a></li><li class="sidebar-sub-header level3"><a href="/vdoing-demo-repository/pages/54ff73/#_3-2-交互式运行-python-程序" class="sidebar-link">3.2. 交互式运行 Python 程序</a></li></ul></li><li class="sidebar-sub-header level2"><a href="/vdoing-demo-repository/pages/54ff73/#_3-3-python-的-ide-pycharm" class="sidebar-link">3.3. Python 的 IDE —— PyCharm</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header level3"><a href="/vdoing-demo-repository/pages/54ff73/#_1-集成开发环境-ide" class="sidebar-link">1） 集成开发环境（IDE）</a></li><li class="sidebar-sub-header level3"><a href="/vdoing-demo-repository/pages/54ff73/#_2-pycharm-介绍" class="sidebar-link">2）PyCharm 介绍</a></li><li class="sidebar-sub-header level3"><a href="/vdoing-demo-repository/pages/54ff73/#_3-pycharm-快速体验" class="sidebar-link">3）PyCharm 快速体验</a></li></ul></li></ul></li><li><a href="/vdoing-demo-repository/pages/d84b0c/" class="sidebar-link">03_PyCharm 的初始设置(知道)</a></li><li><a href="/vdoing-demo-repository/pages/d99c19/" class="sidebar-link">04_多文件项目的演练</a></li><li><a href="/vdoing-demo-repository/pages/6bdfff/" class="sidebar-link">05_注释</a></li><li><a href="/vdoing-demo-repository/pages/20b1cf/" class="sidebar-link">06_算数运算符</a></li><li><a href="/vdoing-demo-repository/pages/82298a/" class="sidebar-link">07_程序执行原理(科普)</a></li><li><a href="/vdoing-demo-repository/pages/9b2741/" class="sidebar-link">08_变量的基本使用</a></li><li><a href="/vdoing-demo-repository/pages/3e8319/" class="sidebar-link">09_变量的命名</a></li><li><a href="/vdoing-demo-repository/pages/a02b0a/" class="sidebar-link">10_判断语句</a></li><li><a href="/vdoing-demo-repository/pages/79d78c/" class="sidebar-link">11_运算符</a></li><li><a href="/vdoing-demo-repository/pages/3ce888/" class="sidebar-link">12_循环</a></li><li><a href="/vdoing-demo-repository/pages/ceea69/" class="sidebar-link">13_函数基础</a></li><li><a href="/vdoing-demo-repository/pages/e158a8/" class="sidebar-link">14_高级变量类型</a></li><li><a href="/vdoing-demo-repository/pages/ed6fdd/" class="sidebar-link">15_名片管理系统(综合应用)</a></li><li><a href="/vdoing-demo-repository/pages/e98ba6/" class="sidebar-link">16_变量进阶(理解)</a></li><li><a href="/vdoing-demo-repository/pages/f99095/" class="sidebar-link">17_函数进阶</a></li></ul> </aside> <div><main class="page"><div class="theme-vdoing-wrapper "><div class="articleInfo-wrap" data-v-06225672><div class="articleInfo" data-v-06225672><ul class="breadcrumbs" data-v-06225672><li data-v-06225672><a href="/vdoing-demo-repository/" title="首页" class="iconfont icon-home router-link-active" data-v-06225672></a></li> <li data-v-06225672><a href="/vdoing-demo-repository/python/#Python" data-v-06225672>Python</a></li></ul> <div class="info" data-v-06225672><!----> <div title="创建时间" class="date iconfont icon-riqi" data-v-06225672><a href="javascript:;" data-v-06225672>2023-04-02</a></div> <!----></div></div></div> <!----> <div class="content-wrapper"><div class="right-menu-wrapper"><div class="right-menu-margin"><div class="right-menu-title">目录</div> <div class="right-menu-content"></div></div></div> <h1><img src="">02_第一个 Python 程序<!----></h1> <!----> <div class="theme-vdoing-content content__default"><h1 id="第一个-python-程序"><a href="#第一个-python-程序" class="header-anchor">#</a> 第一个 Python 程序</h1> <h2 id="目标"><a href="#目标" class="header-anchor">#</a> 目标</h2> <ul><li>第一个 <code>HelloPython</code> 程序</li> <li><code>Python 2.x</code> 与 <code>3​​.x</code> 版本简介</li> <li>执行 <code>Python</code> 程序的三种方式
<ul><li>解释器 —— <code>python</code> / <code>python3</code></li> <li>交互式 —— <code>ipython</code></li> <li>集成开发环境 —— <code>PyCharm</code></li></ul></li></ul> <h2 id="_01-第一个-hellopython-程序"><a href="#_01-第一个-hellopython-程序" class="header-anchor">#</a> 01. 第一个 <code>HelloPython</code> 程序</h2> <h3 id="_1-1-python-源程序的基本概念"><a href="#_1-1-python-源程序的基本概念" class="header-anchor">#</a> 1.1 Python 源程序的基本概念</h3> <ol><li>Python 源程序就是<strong>一个特殊格式的文本文件</strong>，可以<strong>使用任意文本编辑软件</strong>做 <code>Python</code> 的开发</li> <li>Python 程序的 <strong>文件扩展名</strong> 通常都是 <code>.py</code></li></ol> <h3 id="_1-2-演练步骤"><a href="#_1-2-演练步骤" class="header-anchor">#</a> 1.2 演练步骤</h3> <ul><li>在桌面下，新建 <code>认识Python</code> 目录</li> <li>在 <code>认识Python</code> 目录下新建 <code>01-HelloPython.py</code> 文件</li> <li>使用 <strong>gedit</strong> 编辑 <code>01-HelloPython.py</code> 并且输入以下内容：</li></ul> <div class="language-python line-numbers-mode"><pre class="language-python"><code><span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">&quot;hello python&quot;</span><span class="token punctuation">)</span>
<span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">&quot;hello world&quot;</span><span class="token punctuation">)</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>在终端中输入以下命令执行 <code>01-HelloPython.py</code></li></ul> <div class="language-bash line-numbers-mode"><pre class="language-bash"><code>$ python 01-HelloPython.py
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><blockquote><p><code>print</code> 是 <code>python</code> 中我们学习的第一个 <strong>函数</strong></p> <p><code>print</code> 函数的作用，可以把 <strong>&quot;&quot;</strong> 内部的内容，输出到屏幕上</p></blockquote> <h3 id="_1-3-演练扩展-认识错误-bug"><a href="#_1-3-演练扩展-认识错误-bug" class="header-anchor">#</a> 1.3 演练扩展 —— 认识错误（BUG）</h3> <h4 id="关于错误"><a href="#关于错误" class="header-anchor">#</a> 关于错误</h4> <ul><li>编写的程序<strong>不能正常执行</strong>，或者<strong>执行的结果不是我们期望的</strong></li> <li>俗称 <code>BUG</code>，是程序员在开发时非常常见的，初学者常见错误的原因包括：
<ol><li>手误</li> <li>对已经学习过的知识理解还存在不足</li> <li>对语言还有需要学习和提升的内容</li></ol></li> <li>在学习语言时，不仅要<strong>学会语言的语法</strong>，而且还要<strong>学会如何认识错误和解决错误的方法</strong></li></ul> <blockquote><p>每一个程序员都是在不断地修改错误中成长的</p></blockquote> <h4 id="第一个演练中的常见错误"><a href="#第一个演练中的常见错误" class="header-anchor">#</a> 第一个演练中的常见错误</h4> <ul><li>1&gt; <strong>手误</strong>，例如使用 <code>pirnt(&quot;Hello world&quot;)</code></li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>NameError: name 'pirnt' is not defined

名称错误：'pirnt' 名字没有定义
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><ul><li>2&gt; 将多条 <code>print</code> 写在一行</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SyntaxError: invalid syntax

语法错误：语法无效
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><blockquote><p>每行代码负责完成一个动作</p></blockquote> <ul><li>3&gt; 缩进错误</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>IndentationError: unexpected indent

缩进错误：不期望出现的缩进
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><blockquote><ul><li>Python 是一个格式非常严格的程序设计语言</li> <li>目前而言，大家记住每行代码前面都不要增加空格</li></ul></blockquote> <ul><li>4&gt; <strong>python 2.x 默认不支持中文</strong></li></ul> <p>目前市场上有两个 Python 的版本并存着，分别是 <code>Python 2.x</code> 和 <code>Python 3.x</code></p> <ul><li><strong>Python 2.x 默认不支持中文</strong>，具体原因，等到介绍 <strong>字符编码</strong> 时给大家讲解</li> <li>Python 2.x 的解释器名称是 <strong>python</strong></li> <li>Python 3.x 的解释器名称是 <strong>python3</strong></li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SyntaxError: Non-ASCII character '\xe4' in file 01-HelloPython.py on line 3, 
but no encoding declared; 
see http://python.org/dev/peps/pep-0263/ for details

语法错误： 在 01-HelloPython.py 中第 3 行出现了非 ASCII 字符 '\xe4'，但是没有声明文件编码
请访问 http://python.org/dev/peps/pep-0263/ 了解详细信息
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br></div></div><blockquote><ul><li><code>ASCII</code> 字符只包含 <code>256</code> 个字符，不支持中文</li> <li>有关字符编码的问题，后续会讲</li></ul></blockquote> <h4 id="单词列表"><a href="#单词列表" class="header-anchor">#</a> 单词列表</h4> <div class="language- line-numbers-mode"><pre class="language-text"><code>* error 错误
* name 名字
* defined 已经定义
* syntax 语法
* invalid 无效
* Indentation 索引
* unexpected 意外的，不期望的
* character 字符
* line 行
* encoding 编码
* declared 声明
* details 细节，详细信息
* ASCII 一种字符编码
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br></div></div><h2 id="_02-python-2-x-与-3​​-x-版本简介"><a href="#_02-python-2-x-与-3​​-x-版本简介" class="header-anchor">#</a> 02. <code>Python 2.x</code> 与 <code>3​​.x</code> 版本简介</h2> <p>目前市场上有两个 Python 的版本并存着，分别是 <code>Python 2.x</code> 和 <code>Python 3.x</code></p> <blockquote><p>新的 Python 程序建议使用 <code>Python 3.0</code> 版本的语法</p></blockquote> <ul><li>Python 2.x 是 <strong>过去的版本</strong> <ul><li>解释器名称是 <strong>python</strong></li></ul></li> <li>Python 3.x 是 <strong>现在和未来 主流的版本</strong> <ul><li>解释器名称是 <strong>python3</strong></li> <li>相对于 <code>Python</code> 的早期版本，这是一个 <strong>较大的升级</strong></li> <li>为了不带入过多的累赘，<code>Python 3.0</code> 在设计的时候 <strong>没有考虑向下兼容</strong> <ul><li>许多早期 <code>Python</code> 版本设计的程序都无法在 <code>Python 3.0</code> 上正常执行</li></ul></li> <li>Python 3.0 发布于 <strong>2008 年</strong></li> <li>到目前为止，Python 3.0 的稳定版本已经有很多年了
<ul><li>Python 3.3 发布于 2012</li> <li>Python 3.4 发布于 2014</li> <li>Python 3.5 发布于 2015</li> <li>Python 3.6 发布于 2016</li></ul></li></ul></li> <li>为了照顾现有的程序，官方提供了一个过渡版本 —— <strong>Python 2.6</strong> <ul><li>基本使用了 <code>Python 2.x</code> 的语法和库</li> <li>同时考虑了向 <code>Python 3.0</code> 的迁移，<strong>允许使用部分</strong> <code>Python 3.0</code> 的语法与函数</li> <li>2010 年中推出的 <code>Python 2.7</code> 被确定为 <strong>最后一个Python 2.x 版本</strong></li></ul></li></ul> <blockquote><p>提示：如果开发时，无法立即使用 Python 3.0（还有极少的第三方库不支持 3.0 的语法），建议</p> <ul><li>先使用 <code>Python 3.0</code> 版本进行开发</li> <li>然后使用 <code>Python 2.6</code>、<code>Python 2.7</code> 来执行，并且做一些兼容性的处理</li></ul></blockquote> <h2 id="_03-执行-python-程序的三种方式"><a href="#_03-执行-python-程序的三种方式" class="header-anchor">#</a> 03. 执行 Python 程序的三种方式</h2> <h3 id="_3-1-解释器-python-python3"><a href="#_3-1-解释器-python-python3" class="header-anchor">#</a> 3.1. 解释器 <code>python</code> / <code>python3</code></h3> <h4 id="python-的解释器"><a href="#python-的解释器" class="header-anchor">#</a> Python 的解释器</h4> <div class="language-bash line-numbers-mode"><pre class="language-bash"><code><span class="token comment"># 使用 python 2.x 解释器</span>
$ python xxx.py

<span class="token comment"># 使用 python 3.x 解释器</span>
$ python3 xxx.py
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><h5 id="其他解释器-知道"><a href="#其他解释器-知道" class="header-anchor">#</a> 其他解释器（知道）</h5> <p><strong>Python 的解释器</strong> 如今有多个语言的实现，包括：</p> <ul><li><code>CPython</code> —— 官方版本的 C 语言实现</li> <li><code>Jython</code> —— 可以运行在 Java 平台</li> <li><code>IronPython</code> —— 可以运行在 .NET 和 Mono 平台</li> <li><code>PyPy</code> —— Python 实现的，支持 JIT 即时编译</li></ul> <h3 id="_3-2-交互式运行-python-程序"><a href="#_3-2-交互式运行-python-程序" class="header-anchor">#</a> 3.2. 交互式运行 Python 程序</h3> <ul><li>直接在终端中运行解释器，而不输入要执行的文件名</li> <li>在 Python 的 <code>Shell</code> 中直接输入 <strong>Python 的代码</strong>，会立即看到程序执行结果</li></ul> <h4 id="_1-交互式运行-python-的优缺点"><a href="#_1-交互式运行-python-的优缺点" class="header-anchor">#</a> 1) 交互式运行 Python 的优缺点</h4> <h5 id="优点"><a href="#优点" class="header-anchor">#</a> 优点</h5> <ul><li>适合于学习/验证 Python 语法或者局部代码</li></ul> <h5 id="缺点"><a href="#缺点" class="header-anchor">#</a> 缺点</h5> <ul><li>代码不能保存</li> <li>不适合运行太大的程序</li></ul> <h4 id="_2-退出-官方的解释器"><a href="#_2-退出-官方的解释器" class="header-anchor">#</a> 2) 退出 官方的解释器</h4> <h5 id="_1-直接输入-exit"><a href="#_1-直接输入-exit" class="header-anchor">#</a> 1&gt; 直接输入 <code>exit()</code></h5> <div class="language-python line-numbers-mode"><pre class="language-python"><code><span class="token operator">&gt;&gt;</span><span class="token operator">&gt;</span> exit<span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h5 id="_2-使用热键退出"><a href="#_2-使用热键退出" class="header-anchor">#</a> 2&gt; 使用热键退出</h5> <p>在 python 解释器中，按热键 <code>ctrl + d</code> 可以退出解释器</p> <p><img src="media/14950456888393/001_%E7%A7%AF%E8%B7%AC%E6%AD%A5%E4%BB%A5%E8%87%B3%E5%8D%83%E9%87%8C.jpg" alt="001_积跬步以至千里"></p> <h4 id="_3-ipython"><a href="#_3-ipython" class="header-anchor">#</a> 3) IPython</h4> <ul><li>IPython 中 的 “I” 代表 <strong>交互 interactive</strong></li></ul> <h5 id="特点"><a href="#特点" class="header-anchor">#</a> 特点</h5> <ul><li>IPython 是一个 python 的 <strong>交互式 shell</strong>，比默认的 <code>python shell</code> 好用得多
<ul><li>支持自动补全</li> <li>自动缩进</li> <li>支持 <code>bash shell</code> 命令</li> <li>内置了许多很有用的功能和函数</li></ul></li> <li>IPython 是基于 BSD 开源的</li></ul> <h5 id="版本"><a href="#版本" class="header-anchor">#</a> 版本</h5> <ul><li><p>Python 2.x 使用的解释器是 <strong>ipython</strong></p></li> <li><p>Python 3.x 使用的解释器是 <strong>ipython3</strong></p></li> <li><p>要退出解释器可以有以下两种方式：</p></li></ul> <h5 id="_1-直接输入-exit-2"><a href="#_1-直接输入-exit-2" class="header-anchor">#</a> 1&gt; 直接输入 <code>exit</code></h5> <div class="language-python line-numbers-mode"><pre class="language-python"><code>In <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">:</span> exit
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h5 id="_2-使用热键退出-2"><a href="#_2-使用热键退出-2" class="header-anchor">#</a> 2&gt; 使用热键退出</h5> <p>在 IPython 解释器中，按热键 <code>ctrl + d</code>，<code>IPython</code> 会询问是否退出解释器</p> <h4 id="ipython-的安装"><a href="#ipython-的安装" class="header-anchor">#</a> IPython 的安装</h4> <div class="language-bash line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">sudo</span> <span class="token function">apt</span> <span class="token function">install</span> ipython
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h2 id="_3-3-python-的-ide-pycharm"><a href="#_3-3-python-的-ide-pycharm" class="header-anchor">#</a> 3.3. Python 的 IDE —— <code>PyCharm</code></h2> <h3 id="_1-集成开发环境-ide"><a href="#_1-集成开发环境-ide" class="header-anchor">#</a> 1） 集成开发环境（IDE）</h3> <p>集成开发环境（<code>IDE</code>，Integrated Development Environment）—— <strong>集成了开发软件需要的所有工具</strong>，一般包括以下工具：</p> <ul><li>图形用户界面</li> <li>代码编辑器（支持 <strong>代码补全</strong>／<strong>自动缩进</strong>）</li> <li>编译器／解释器</li> <li>调试器（<strong>断点</strong>／<strong>单步执行</strong>）</li> <li>……</li></ul> <h3 id="_2-pycharm-介绍"><a href="#_2-pycharm-介绍" class="header-anchor">#</a> 2）PyCharm 介绍</h3> <ul><li><code>PyCharm</code> 是 Python 的一款非常优秀的集成开发环境</li> <li><code>PyCharm</code> 除了具有一般 IDE 所必备功能外，还可以在 <code>Windows</code>、<code>Linux</code>、<code>macOS</code> 下使用</li> <li><code>PyCharm</code> 适合开发大型项目
<ul><li>一个项目通常会包含 <strong>很多源文件</strong></li> <li>每个 <strong>源文件</strong> 的代码行数是有限的，通常在几百行之内</li> <li>每个 <strong>源文件</strong> 各司其职，共同完成复杂的业务功能</li></ul></li></ul> <h3 id="_3-pycharm-快速体验"><a href="#_3-pycharm-快速体验" class="header-anchor">#</a> 3）PyCharm 快速体验</h3> <p><img src="media/14950456888393/001_PyCharm%E7%9A%84%E7%95%8C%E9%9D%A2%E7%BB%93%E6%9E%84.png" alt="001_PyCharm的界面结构"></p> <ul><li><strong>文件导航区域</strong> 能够 <strong>浏览</strong>／<strong>定位</strong>／<strong>打开</strong> 项目文件</li> <li><strong>文件编辑区域</strong> 能够 <strong>编辑</strong> 当前打开的文件</li> <li><strong>控制台区域</strong> 能够：
<ul><li>输出程序执行内容</li> <li>跟踪调试代码的执行</li></ul></li> <li>右上角的 <strong>工具栏</strong> 能够 <strong>执行(SHIFT + F10)</strong> / <strong>调试(SHIFT + F9)</strong> 代码</li></ul> <p><img src="media/14950456888393/002_PyCharm%E8%BF%90%E8%A1%8C%E5%B7%A5%E5%85%B7%E6%A0%8F.png" alt="002_PyCharm运行工具栏"></p> <ul><li>通过控制台上方的<strong>单步执行按钮(F8)</strong>，可以单步执行代码</li></ul> <p><img src="media/14950456888393/003_PyCharm%E8%B0%83%E8%AF%95%E5%99%A8.png" alt="003_PyCharm调试器"></p></div></div> <!----> <div class="page-edit"><div class="edit-link"><a href="https://github.com/xugaoyi/vuepress-theme-vdoing/edit/master/docs/00.Python/02.第一个 Python 程序.md" target="_blank" rel="noopener noreferrer">编辑</a> <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></div> <!----> <!----></div> <div class="page-nav-wapper"><div class="page-nav-centre-wrap"><a href="/vdoing-demo-repository/pages/c438df/" class="page-nav-centre page-nav-centre-prev"><div class="tooltip">01_认识 Python</div></a> <a href="/vdoing-demo-repository/pages/d84b0c/" class="page-nav-centre page-nav-centre-next"><div class="tooltip">03_PyCharm 的初始设置(知道)</div></a></div> <div class="page-nav"><p class="inner"><span class="prev">
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